context: fix for icc - test for x86_64 before i386
context: remove 'error' pre-processor macro for i386; add description
context: reformating Jamfile
context: add assembler attributes to ppc64 asm
context: set correct size on stack for parameter are
context: refactor unwind example (recursive call)
context: library stripped
context: enable ucontext in performance test
context: reorganice performance measurement
context: support of other compilers for performance test
icontext: use snprintf in seh handler
context: MACRO for snprint
context: correct foramt flag in seh.cpp
context: remove programm_options from performance test

context: no PGI support in cycle_x86-64.hpp
context: documentation related to preserving floating-pointer registers
context: update documentation related to FPU registers and calling conventions
context: add link to MSDN related to register usage on Win64
context: addtional comments to FPU and calling convetion
context: update asm according to calling convetion for FP